Window-scaffold.



G. H. LINDELOF.

WINDOW SCAFFOLD.

APPLICATION FILED MAR. 9. 1915.

2 SHEETS-SHEET1.

Patented Dec. 7, 1915.

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INVENTOR S E S WITNES ATTO R N EY G. H. LINDELOF.

wmoow SCAFFOLD. I APPUCATION FILED MAR. 9, I915 Llfi fl Patented Dec. 7, 1915.

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Application filed March 9,

To all whom it may concern:

Be it known that f, GUs'rAF H. Linnnnor, a citizen of the United States, residing at De Kalb, in the county of Dekalb and State of Illinois, have invented a new and useful l Vindow-Scaifold, of which the following is a specification.

This invention has reference to window scaffolds and its object is to provide a device for the purpose which shall be light in weight, amply strong, and capable of production at a low cost, and at the same time be adaptable to various conditions.

In accordance with the present invention there is provided an elongated bar designed to be placed Within a building lengthwise of a window and reachin from the top to the bottom of the frame thereof. Attached to this bar so as to be adjustable therealong is a shelf or platform capable of projecting through the window to the outside of the building for a distance sufficient to sustain a workman or other person. The shelf or platform is provided with a sustaining bracket designed to engage the front of the building, and so arranged that it may be adjusted to accommodate the structure to buildings having projections below thewindow sill without necessitating any movement of the shelf or platform which would bring it clear of the window sill.

By providing certain adjustments and attachments the device iscapable of use undcr a great variety of conditions.

Tie invention will be best understood from a consideration of the following detailed description, taken in connection with the accompanying drawings, forming a part of this specification, with the further understanding that while the drawings show a practical form of the invention, the latter is not confined to any strict conformity with the showing of the drawings, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention. r

In the drawings :-'Figure l is a longitudinal section more or less schematically represented, of a window, and showing the invention applied thereto, some parts of the structure of the invention being broken away and shown in section. Fig. 2 is a bottom plan view of the shelf with some parts in section on the line 2-2 of Fig. 1. Fig. 3 is a section on the line 3-3 of Fig. 1 also showing some of the distant parts in section Specification. of Letters Zatent.

Patented flee. Y, 1915.

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and omitting any showing of the window.

Fig. l: is a perspective view of the shelf with parts omitted and illustrating the temporary railing. l ig.v 5 is a pers ilective view of the inside bar and of a pad which may be used in connection therewith. Fig. 6 is a perspective view of a bracket used in con nection with the shelf. Fig. 7 is a perspective view of an adjustable link employed in connection with the shelf.

Referring to the drawings there is shown a window structure 1 provided with a sill'iZ.

Adapted to be lodged on the inner side of the window is an elongated bar 3 of wood or metal having near one end a projecting bracket which, as well as adjacent parts of the bar, may have a soft lining 5 of felt or other suitable padding material to avoid any .niarring of the window casing where engaged by the parts thus lined. There is also provided another pad 6 which may be made of felt or some suitable material from one face of which there projects opposed lingers 7 designed to be applied to the bar 3 on opposite side faces thereof to hold the pad 6 in diiierent adjusted positions. The purpose of the pad is to engage portions of the window frame back of the sill and thus prevent them from being marred.

Slidable along the bar 3 is a link 8 shown separately in 7, and this link has at one end an eye 9 in shape and size adapted to be traversed by the bar 3. A. set screw 10 which may be provided with a wing head for easy manipulation is threaded through one wall of the eye 9 so as to clamp against the bar 3 and thus hold the link in adjusted positions along the bar.

The link 8 which is in the form of an elongated bar of metal is provided with a series of perforations ll and the link is of a length to project from the bar 3 through the window to the exterior thereof, this link being usually located close to the sill 2. There is also provided a shelf or platform 19. of such size as may be desired. and this shelf or platform is t'iesigned to be of sullicient size to project beyond the front of the window to an extent permitting a person to stand thereon and thenbe far enough away from the front of the building to perform any work needed.

Usually the shelf or platform 12 is of rectangular outline, but, of course, at may be otherwise shaped. Considering the shelf of rectangular outline and of a width permitting it to pass through the frame of the window 1, the shelf has secured thereto near opposite sides of the rear edge blocks 13 designed to rest upon the windowsill and support the rear edge of the shelf at a suitable height.

Applied to opposite sides of the bottom face of the shelf 12 near the edgesthereof are strips 1d approeahing at the rear edge of the shelf and ultimately bent into spaced parallel relation. These strips terminate in eye ends 15 each having its perforation in line with the other and adapted to aline with any one of the perforations 11 in the link 8. When so alined the perforations in the link and in the eye ends 15 of the strips 14: are traversed by a bolt 16 provided at one end with a wing nut 17 or other suitable means for its ready manipulation. By means of the link 8 and the eye ends 15 of the strips let, the shelf 12 is readily adjusted with relation to the bar 3 to hold the shelf in such position that the blocks 13 will rest upon the window sill against'any liability of being pulled therefrom toward the outside of the Window. The link 8 provides for the adaptation of the shelf to windows having'window benches of different widths.

Fast to the under side of the shelf 12 in the'front to rear center line thereof, but so as to be adjusted along said line, is one arm 18 of an angle bracket 19 having another arm 20 in one piece with the arm 18. The

bracket 19 isconveniently made of flat bar iron, and the arm 20 is twisted near its junction with the arm 18, so as to lie in a plane perpendicular to the plane of the arm 18. The shelf 12 has fast thereto a strap 21 in position to be traversed by the arm 18 of the bracket 19, and this arm 18 is'formed with a longitudinal-series of perforations 22, in any one of which may be lodged a set screw 23 threaded through the strap 21. The set screw 23 is provided with a wing head for its ready manipulation and when screwed into the strap 21 so as to enter a perforation 22 the bracket is held in the desired position v with relationto the shelf 12.

When the shelf 12 is in operative position projecting approximately horizontally from the window the arm 20 of the bracket 19 is directed downwardly and toward the front of the building to which the shelf is applied. This arm near its lower end is provided with perforations 24: and 25. The perforation 25 is traversed by a pivot bolt 26 which also traversesa block 27 designed to bear against the front of the building and so constitute a ing means for securing the links 30 to the shelf.

At those corners of the shelf which may be termed the outer corners are perforations or passages 33 which may also extend through the corresponding ends of the strips 14 and these passages are designed to receive dowel ends 3 of posts 35 having eyes 36 at their other ends. Screw eyes 37 are provided at the inner corners of the shelf and a rope or cord 38 is secured at the ends to the eyes 37 and threaded through the eyes 36 on the tops of the posts 35, thus providing a guard railing.

The shelf is applied to a window by first adjusting the bracket t to the upper or lintel portion of the window frame within the building and the link 8 is then adjusted on the bar 3 so as to be close to the window sill. The shelf 12 which is capable of turning on the bolt 16 as a hinge, is extended be yond the front of the window with the blocks 13 resting on the window sill, whereupon the nut 17 of the bolt 16 is tightened and the set screw 10 may also be tightened. The bracket 19 is so adjusted along the shelf that the block 27 is in engagement with the front of the building below the window sill. Should there be any projections on the front of the building these are easily taken care of by a downward adjustment of the bracket 19 and without disturbing the relation of the blocks 13 to the window sill. Such a shelf is particularly rigid and will sustain a relatively great weight and far more than the weight of a full grown man. At the same time the structure which may be largely made of wood and strap and bar metal may be made of comparatively small weight and is susceptible of production at a very low cost. Moreover, the parts are all foldable into small compass and have a range of adjustment permitting the use of the one shelf or scaffold for windows varying greatly in height.

The connectionsof the links 30 with the shelf and bracket arm 20 may have play enough to permit such movements of the bracket as are needed to accommodate the structure for projections on the face of the building without requiring that the shelf be adjusted so far outward as to bring the blocks 13 beyond the window sill or even toward the edge of the window sill sufiiciently to cause poor support.

The bar 3 affords a particularly advantageous means for supporting the rear edge of the shelf, so that parts of the window casing which might be liable to give way are not subjected to any strains at all in directions tending to dislodge them, since such strains are in a large measure resisted by the engagement of the bracket 4 with the lower edge of the lintel portion of the window casing.

What is claimed is t l. A window scadold comprising a bar of greater length than the opening of the window frame to which the scaffold is to be applied and having means for engaging the lintel portion of said frame, a link provided at one end with an eye traversed by the barwhen in operative position and also having at the eye end means for holding the link at any point along the bar, and a shelf connected to the link for adjustment lengthwise thereof and provided with means for engaging the bench portion of the window frame in coactive relation to the bar, whereby the link and shelf constitute means for clamping the bar between the lintel and bench portions of the window frame.

2. A, window scafiold comprising a bar of greater length than the opening of the window frame to which the scaffold is to be applied and having means for engaging the lintel portion of said frame, a link provided at one end with an eye traversed by the bar when in operative position and also having at the eye end means for holding the link at any point along the bar, and a shelf connected to the link for adjustment lengthwise thereof and provided with means for engaging the bench portion of the window frame in coaetive relation to the bar, whereby the link and shelf constitute means for clamping the bar between the lintel and bench portions of the window frame, and said shelf being also provided with a bracket adapted to engage the front wall of the building having the window therein and adjustably connected to the shelf for movement toward and from the bar.

3. A window scaffold comprising a bar of greater length than the opening of the window frame to which the scaffold is to be applied and having means for engaging the lintel portion of said frame, a link provided at one end with an eye traversed by the bar when in operative position and also having at the eye end means for holding the link at any point along the bar, a shelf provided with spaced means for engaging the bench portion of the window frame and having connections with the link between said spaced means for clamping the bar against the bench portion of the window frame with the lintel engaging portion of the bar clamped thereagainst, and a bracket carried by the shelf with coacting means on the bracket and shelf for holding the bracket in different positions of adjustment toward or from that end of the shelf connected to the link, with the bracket provided with means for engaging the front wall of the building having the window therein, and link connections between the shelf and the bracket for bracing the latter with the links participating in the adjustments of the bracket.

a. A window scaffold comprising a shelf with spaced members for engaging the outer side of the bench portion of the window frame to which the scaffold is applied, a link adj ustably connected to the shelf intermediate of the bench engaging portions, and a bar carried by and movable with relation to the link lengthwise of the bar, said link and bar having means for locking the link to the bar, and said bar being of greater length than the height of the window frame and provided at one end with means for engaging the lintel of the window frame, whereby the shelf and link serve to clamp the bar to the bench portion of'the window frame intermediate of the width of the frame and the lintel engaging portion of the bar to the lintel of the window frame.

5. A window scaffold comprising a shelf with marginally arranged straps terminating in eye ends brought into close spaced relation at the rear end of the shelf, and with laterally spaced blocks at the rear end of the shelf adapted to rest on the window sill and raise the shelf therefrom, a link having a longitudinal series of perforations and adapted to be lodged between the eye ends of the straps, fastening means traversing the eye ends of the straps and one of the perforations in the link, and said link having one end formed into an eye, and an elongated bar traversing the eye of the link and at one end provided with means for engaging the lintel portion of the window frame, the eye end of the link having means for clamping it to the bar and the link and shelf coacting with the bar to clamp the latter to the window frame intermediate of the width of the shelf.

6. A window scafiold having a shelf provided with marginally arranged straps terminating in eye ends brought into close spaced relation at the rear end of the shelf, a link having a longitudinal series of perforations and adapted to be lodged between the eye ends of the straps, a bolt in traversing relation to the eye ends of the straps and to one of the perforations in the link, said link having one end formed into an eye and provided with a set screw, and an elongated bar traversing the eye of the link and having at one end a bracket adapted to engage under the lintel portion of the window frame.

In testimony, that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

GUSTAF H. LINDELOF.

Witnesses:

E. E. Qursr, FRANK HOPKINS.

Gopies of this patent may be obtained for five cents each, by addressing" the Commissioner of Patents, Washington, D. 0. 

